Can't add custom headers in Rest Resource queries since v10 upgrade.

[zzooeeyy]

Issue summary

Before shopify-api-ruby v10 upgrade, you can set the Rest API request headers directly in the initializer: ShopifyAPI::Base.header['Header'] = 'value'

After the v10 upgrade, it looks like we don’t have a way to set headers on any Rest Resource calls anymore, you can only use extra headers if you use the actual Rest Client ..

########### Using Rest Client class:
client = ShopifyAPI::Clients::Rest::Admin.new(session: session)
response = client.get(path: "products", headers: {"MyHeader": "value"})

########### Using Rest Resource:
ShopifyAPI::Rest::Product.all 
# There is no option to pass in any extra header information because ShopifyAPI::Rest::Base.request doesn't accept it

ShopifyAPI::Rest::Base.request <- Doesn’t accept extra headers when making any requests ShopifyAPI::Clients::Rest::Admin.make_request <- Accepts extra headers when making requests

• shopify_api version: since v10

Expected behavior

There should be at least feature parity for the Rest client vs Rest resources. We should add extra header support for Rest resources.